Centrifugal milk separator



H. RHL.

GENTRIFUGAL MILK SEPARATOR Filed May 20, 1924 Patented Dec. i6, i924,

NliTEl) STATES HANS RHL, 'GIF MANNHEIM, GERMANY, ASSIGNOR TO SUHWARZWALDWERKE LANE, KOMMANDITGESELLSCHAFT, A COPARTNERSHIP, 0F DONAUESCHINGEN, BADEN,

GERM-ANY.

Application led May 20, 1924.

T 0 all whom t may concern:

Be it known that I, Heirs Roi-rn, a citizen of Germany, residing at Mannheim, Baden, Germany, have invented certain. new and useful improvements in Centrifugal Milk Separatore, of which the following is a specification.

My present invention relates to milk centrifugals, of combined separator and purifier type; and has for its obiect the production of centrifugals of greater cayjiacity than has heretofore been possible.

In small milk centrifugals, thc drum has been made with the top or cover integral with its cylindrical outer shell and the latteris seated upon a separate bottom plate and pressed down thereon to form a tight joint by means of a nut threaded upon the inlet pipe. But such a construction is not possible in centrifugals of large size and capacityat least in centrifugals of the combined separator and purifier type which must necessarily contain, in addition to the plates or similar inserts serving to separate the cream from the skim milk, the blades required for separating out the impurities contained therein.

Hence, in the larger' power centrifugals for the purification as well as the separation of milk, in which a maximum capacity of 3500 to 4000 liter hours has been attained, the annular shell of the drum is carried as a cylinder to the top and a separate cover, of the diameter of the cylinder, has been secured to its seat thereon by means of screws. This construction also becomes impracticable in case it is desired to further increase the capacity of the machines; and it is this fact which has fixed the limit heretofore reached. For example, the cover becomes so heavy, weighing somewhat over one hundred kilograms for drums of say six hundred millimeters diameter, that it cannot be removed and replaced by hand, or' only with the greatest difficulty, the installing of the overflow nut also presents very considerable difficult-ies not only because of its weight but with respect to matters of construction, such as the cutting of the screw thread and the manipulation of the nut; and furthermore, with the large dimensions required, the temperature expansion and the bearing strains due to the great weight become unpleasantly prominent.

Serial No. 714,583.

l have obviated the difliculties enumerated and have solved the problem of increasing the capacity of these machines without increasing` their weight, by my present invention, which, briefly stated, consists in arching inwardly the upper portion of the annular shell of the drum, and in thereby contracting the opening at the top to a size merely sufiicient for the insertion and withdrawal of the separator plate or plates. The shell thus constructed, as a rotation body the generatrix of which is substantially U-shaped, provides therein the annular outer space required for-the fixed purifier blades, and the cover, thus reduced to the least possible diameter and weight, is secured to its seat thereon by a nut upon the inlet pipe as is customary in the small centrifugals.

A separator drum illustrating by way of example one embodiment of the invention is shown, in central vertical section, in the single figure of the accompanying drawings.

Referring to the drawings, a indicates the cylindrical part of the shell or casing, which is joined to the bottom it in any suitable manner and can, if desired, be cast integral therewith, and b is the inwardly arched upper portion thereof which terminates in the flanged seat Zn', for the cover, and provides an opening contracted to the minimum permitting the insertion and removal therethrough of the conical separator plates c. The cover d has a flanged outer edge cl', which fits the seat on the shell, and is screwed down tight thereon, or on the usual packing, by means of the nut e threaded in the usual manner upon the inlet pipe f. The blades g g are the radially disposed blades, secured in fixed position to the inner walls of the shell, which serve for the moveniient of the milk and for the separation of' the impurities therein.

By a construction of the separator drum substantially as described I am able to produce, and have produced, practical comm-ercial centrifugals having a capacity of upwards of 6000 liter hours.

What I claim as new, and desire to secure by Letters Patent, is-

l. A drum formilk centrifugals comprising a bottom and annular shell, the latter inwardly arched at its upper end, which provide a contracted opening of a size merely sul'licient for the insertion and removal of the separator plates and an annular space surrounding the central space occupied by such plates and extending upwardly to the rim of the uppermost thereof, and a cover which at its outer edge seats upon the upper contracted edge of the shell and is removably secured thereon by a nut threaded upon the milk inlet pipe.

2. A drum Ifor milk centrifugals of large size and capacity comprising abottom with upturned outer edge, an annular shell seating at its lower edge upon the edge of the bottom and at its upper end arched inwardly to provide a contracted opening, and a cover seating' at its outer edge upon the contracted upper edge of the shell.

3. A drum for milk centrifugas comprising a bottom, an annular shell seating at its lower edge upon the bottom and arched in wardly atits upper end and a cover seating` at its outer edge upon the contracted upper edge of the shell, the said parts being removably securedtogether by a nut threaded upon the milk inlet pipe and providing at the top of the shell an opening suliicient only for the insertion and removal of the separator plates and within the shell Van annular space surrounding the central space occupied by such plates and extending upwardly to the rim of the uppermost thereof.

4.' A drum ,for milk centrifugals of large capacity but moderate weight comprising an annular shell which is of a diameter suiiicient to provide for the installation therein, outside and surrounding the central space occupied by the separator plates, 'of the usual annulus of milk purifying blades and which at its upper end is arched inwardly to provide a contracted flanged opening or a size suflicientonly to permit the insertion andremoval of the separator plates,'and a cover which fits upon the flanged opening of the shell andy is secured thereon by anut threaded upon the milk inletv pipe.

y HANS RHL.

Witnesses:

GoLUND LUNDWAR, PAUL GLESTI. 

